<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>浮动练习-京东多列布局(Floating Exercise - JD Multi Column Layout)</title>
  <style>
    .container {
      width: 1190px;
      height: 1000px;
      background-color: skyblue;
      margin: 0 auto;
    }

    .container .area-list {
      margin-right: -10px;
      overflow: auto;
    }

    .container .area-list .item {
      width: 290px;
      background-color: brown;
      float: left;
      margin-right: 10px;
      margin-bottom: 10px;
    }

    .container .area-list .item.left {
      height: 370px;
    }

    .container .area-list .item.right {
      height: 180px;
    }
  </style>
</head>
<body>
  
  <div class="container">
    <div class="area-list">
      <div class="item left"></div>
      <div class="item left"></div>
      <div class="item right"></div>
      <div class="item right"></div>
      <div class="item right"></div>
      <div class="item right"></div>
      <div class="item right"></div>
      <div class="item right"></div>
      <div class="item right"></div>
      <div class="item right"></div>
      <div class="item right"></div>
      <div class="item right"></div>
      <div class="item right"></div>
    </div>
  </div>

</body>
</html>